Fixes handling of EINTR and EAGAIN errnos in the fdhubflow. Fixes a destruction bug where the flow was deleted by a child object before the executor was drained by the parent's destructor.
Fixes handling of EINTR and EAGAIN errnos in the fdhubflow.
Fixes a destruction bug where the flow was deleted by a child object before the executor was drained by the parent's destructor.

bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn